Design patterns implemented in Java

Quarkus: Supersonic Subatomic Java.

Most popular Mocking framework for unit tests written in Java

✅ The programmer-friendly testing framework for Java and the JVM

configuration library for JVM languages using HOCON files

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

Azkaban workflow manager.

A complete 3-D game development suite written in Java.

Assembly programming game

An easy to use multithreaded library for creating Discord bots in Java.

A simple Java Scheduler library with a minimal footprint and a straightforward API

Set of test framework extensions (JUnit 4, JUnit 5, Spock) to enhance the testing of CDI components via Weld. Supports Weld 5.

Asynchronous Semantic Ad-hoc Protocol (ASAP) engine for Java